append mouseover into icon

Hallo,
I have an actioncolum with 3 icons.
The 2a icon I'd like append the mouseover and mouseout events.
Can I help suggest to this problem ?

this is a schema code:

xtype: 'actioncolumn',
items: [{ iconCls: 'myclass',
icon: 'icon1.png',
action: 'view1'
},
{ iconCls: 'myclass',
icon: 'icon2.png',
action: 'view2'
}]
....................................


Can I intercetted the afterRender in mvc that icon2 ? so to insert

el.on('mouseover', function(el){alert('hello')});

Thanks.

Code:

---

el.on({
    scope    : grid,
    delegate  : '.myclass', //Dom Selector
    mouseover : someFunction
});

---